Northeast Frontier Railway (NFR) spokesman Jayamta Sarma said that the accident occurred between Salakati and Basugaon at 5.15 AM as the 55753 UP Sifung passenger train was about to negotiate a bridge.

All the passengers of the train coming from Alipurduar in Bengal to Guwahati were transhipped from the accident site, Sarma said.

At least 10 trains were cancelled as the railway track was blocked due to the derailment, Sarma said. Long-distance trains have also been affected as their timings have been changed.

The NFR has ordered a probe and top officials have rushed to the spot.